In China,People usually will go to 4S shop when vehicle need to repair and maintenance,but more man prefer to workshop repair their cars.because 4S shop is tool expensive.

A good news --There are some standards about automotive aftermarket is making,and will be released.such as "Parallel import car service norms","Car service standards","Auto 4S shop management and service standards","Car service evaluation norms".then the quality of auto spare parts will be tracked from manufacturer to retailer.mean you can purchase good quality auto spare parts as 4S shop from workshop,so auto spare parts price will be lower in future.